My 02' BMW X5 Will Not Start --Please HELP!--

My BMW X5 Cranks, but does not start. Here is a list of troubleshooting I've done so far;

1. Checked all Fuses and relays. (Front, Glove and Rear fuse boxes)2. Checked Fuel Pump, working fine. Also tried priming the fuel pump and the car fired up for a few seconds and then shut down. Which leads me to believe that the fuel pump is somehow not getting power. 3. Checked Crankshaft Position Sensor, working fine. 4. Camshaft Position Sensor checked, working fine.

I guess you need to measure voltage applied to the fuel pump at
start up to determine if it is getting voltage. Also there might be
an inertia (crash) switch somewhere on the vehicle that needs to
be reset. This switch is activated by a hard impact and
disconnects the electricity from the fuel pump in the event of a
crash. Sometimes they are activated by a bump or jolt to the
vehicle.

Look at the video at the link. I am thinking your BMW has a Battery
Safety Terminal that when activated opens the circuit to the fuel
pump. This is similar in function to an inertia switch, but it is not
resetable........https://www.youtube.com/watch?v=s-XO98LOa3Q

So I just tested the bat safety cable, and as suspected it was
functioning properly. I'm still in the process of locating the inertia
switch, checked the owners manual and couldn't find anything. If
you have any idea where it is, or where I should look please let me
know.

Do what you were going to do, measure the voltage at the fuel
pump when trying to crank it or turning the key to the on position.
Has this vehicle been recently wrecked? Are you sure this is not an
anti-theft problem possibly related to the key or key(s)?

Yes, I pulled the pump out and tested it separately. I placed it back
into vehicle, primed it, and it started right up for a few seconds and
then it died out. While the pump was installed, I shorted the pump
and started up, again only for a few seconds.
I'm not sure if the vehicle has been involved in an accident or
fender bender, however the frame and the body looks good, no sign
of repairs or previous body damage.
If the problem involves the anti theft system, what would you
recommend I begin troubleshooting?

Your Answer

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